Key statistics
Satellite SL-11 R/B at a glance.
Uptime
20140
Days in orbit
Revolutions
≈ 13.0
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
62.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-11 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-11 R/B
International designator: 1970-089B
Object number (NORAD): 4597
Object ID (CCSDS): 4597
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 111.148 minutes
Inclination: 62.9384 deg
SMA: 7657.645 km
Apoapsis: 2035.402 km
Periapsis: 523.618 km
RAAN: 9.811 deg
Eccentricy: 0.09871075
Argument of periapsis: 44.9712 deg
Mean anomaly: 322.7058 deg
Mean motion: 12.95567104 rev/day
Mean motion (dot): 0.00000184 rev/day2
B* drag term: 0.00009718159 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 6:41 a.m. UTC
TLE line 0: 0 SL-11 R/B
TLE line 1: 1 04597U 70089B 25346.27866261 .00000184 00000-0 97182-4 0 9991
TLE line 2: 2 04597 62.9384 9.8110 0987107 44.9712 322.7058 12.95567104735469
Live tracking on map
Real-time ground track for satellite SL-11 R/B.
Associated space launch
The I2P satellites were the first soviet coorbital ASAT system.
SL-11 R/B was lifted into orbit during the mission ‘Tsiklon-2 | I2P 4’, on board a Tsiklon-2 space rocket.
The launch took place on Oct. 23, 1970, 4:42 a.m. from 90/20.
For more information about the launch, click the button.
Tsiklon-2 | I2P 4
Agency: N/A
Status: Launch Successful
Launch date: Oct. 23, 1970, 4:42 a.m. UTC
Rocket: Tsiklon-2
Launch pad: 90/20
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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